/*
 * GenomicX Design System
 * https://github.com/genomicx/front-end-template
 */

/* =============================================================================
   1. DESIGN TOKENS
   ============================================================================= */

:root {
  --gx-accent:       #0d9488;
  --gx-accent-hover: #0f766e;
  --gx-indigo:       #6366F1;
  --gx-success:      #14B8A6;
  --gx-warning:      #F59E0B;
  --gx-error:        #EF4444;

  --gx-radius:       8px;
  --gx-radius-lg:    12px;
  --gx-radius-sm:    4px;
  --gx-radius-pill:  999px;
  --gx-transition:   0.2s ease;
  --gx-max-width:    1080px;
  --gx-nav-height:   60px;

  --gx-font-sans: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', system-ui, sans-serif;
  --gx-font-mono: 'JetBrains Mono', 'Fira Code', monospace;

  --gx-space-1:  0.25rem;
  --gx-space-2:  0.5rem;
  --gx-space-3:  0.75rem;
  --gx-space-4:  1rem;
  --gx-space-5:  1.25rem;
  --gx-space-6:  1.5rem;
  --gx-space-8:  2rem;
  --gx-space-10: 2.5rem;
  --gx-space-12: 3rem;
  --gx-space-16: 4rem;
  --gx-space-20: 5rem;
}

/* --- LIGHT THEME (default) --- */
:root {
  --gx-bg:            #f8fafc;
  --gx-bg-alt:        #f1f5f9;
  --gx-surface:       #ffffff;
  --gx-surface-hover: #f1f5f9;
  --gx-bg-elevated:   #f1f5f9;
  --gx-text:          #0f172a;
  --gx-text-muted:    #64748b;
  --gx-text-bright:   #0f172a;
  --gx-text-inverted: #ffffff;
  --gx-border:        #e2e8f0;
  --gx-accent-dim:    rgba(13, 148, 136, 0.08);
  --gx-accent-15:     rgba(13, 148, 136, 0.12);
  --gx-indigo-dim:    rgba(99, 102, 241, 0.08);
  --gx-nav-bg:        rgba(255, 255, 255, 0.9);
  --gx-code-bg:       #f1f5f9;
  --gx-shadow:        0 1px 3px rgba(0, 0, 0, 0.08);
  --gx-logo-stroke:   #0D9488;
  color-scheme: light;
}

/* --- DARK THEME --- */
[data-theme="dark"] {
  --gx-accent:        #2dd4bf;
  --gx-accent-hover:  #14b8a6;
  --gx-bg:            #0f172a;
  --gx-bg-alt:        #1e293b;
  --gx-surface:       #1e293b;
  --gx-surface-hover: #334155;
  --gx-bg-elevated:   #1e293b;
  --gx-text:          #f1f5f9;
  --gx-text-muted:    #94a3b8;
  --gx-text-bright:   #f1f5f9;
  --gx-text-inverted: #0f172a;
  --gx-border:        #334155;
  --gx-accent-dim:    rgba(45, 212, 191, 0.1);
  --gx-accent-15:     rgba(45, 212, 191, 0.15);
  --gx-indigo-dim:    rgba(99, 102, 241, 0.15);
  --gx-nav-bg:        rgba(15, 23, 42, 0.9);
  --gx-code-bg:       #0f172a;
  --gx-shadow:        0 1px 3px rgba(0, 0, 0, 0.3);
  --gx-logo-stroke:   #14B8A6;
  color-scheme: dark;
}

/* --- System preference auto-detection --- */
@media (prefers-color-scheme: dark) {
  :root:not([data-theme]) {
    --gx-accent:        #2dd4bf;
    --gx-accent-hover:  #14b8a6;
    --gx-bg:            #0f172a;
    --gx-bg-alt:        #1e293b;
    --gx-surface:       #1e293b;
    --gx-surface-hover: #334155;
    --gx-bg-elevated:   #1e293b;
    --gx-text:          #f1f5f9;
    --gx-text-muted:    #94a3b8;
    --gx-text-bright:   #f1f5f9;
    --gx-text-inverted: #0f172a;
    --gx-border:        #334155;
    --gx-accent-dim:    rgba(45, 212, 191, 0.1);
    --gx-accent-15:     rgba(45, 212, 191, 0.15);
    --gx-indigo-dim:    rgba(99, 102, 241, 0.15);
    --gx-nav-bg:        rgba(15, 23, 42, 0.9);
    --gx-code-bg:       #0f172a;
    --gx-shadow:        0 1px 3px rgba(0, 0, 0, 0.3);
    --gx-logo-stroke:   #14B8A6;
    color-scheme: dark;
  }
}

/* =============================================================================
   2. RESET & BASE
   ============================================================================= */

*,
*::before,
*::after {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

body {
  font-family: var(--gx-font-sans);
  background: var(--gx-bg);
  color: var(--gx-text);
  line-height: 1.7;
  font-size: 1rem;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

a {
  color: var(--gx-accent);
  text-decoration: none;
  transition: color var(--gx-transition);
}

a:hover {
  color: var(--gx-accent-hover);
}

img {
  max-width: 100%;
  display: block;
}

/* =============================================================================
   3. NAVIGATION
   ============================================================================= */

.gx-nav {
  position: sticky;
  top: 0;
  z-index: 100;
  background: var(--gx-nav-bg);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--gx-border);
}

.gx-nav-inner {
  max-width: var(--gx-max-width);
  margin: 0 auto;
  padding: 0 2rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: var(--gx-nav-height);
}

.gx-nav-logo {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  font-weight: 700;
  font-size: 1.125rem;
  color: var(--gx-text-bright);
  letter-spacing: -0.02em;
}

.gx-nav-logo svg {
  width: 24px;
  height: 24px;
}

.gx-nav-logo span {
  color: var(--gx-accent);
}

.gx-nav-links {
  display: flex;
  align-items: center;
  gap: 2rem;
  list-style: none;
}

.gx-nav-links a {
  color: var(--gx-text-muted);
  font-size: 0.875rem;
  font-weight: 500;
  transition: color var(--gx-transition);
}

.gx-nav-links a:hover,
.gx-nav-links a.active {
  color: var(--gx-text-bright);
}

.gx-nav-github {
  display: flex;
  align-items: center;
  gap: 0.4rem;
  color: var(--gx-text-muted) !important;
  font-size: 0.875rem;
}

.gx-nav-github svg {
  width: 18px;
  height: 18px;
}

.gx-nav-toggle {
  display: none;
  background: none;
  border: none;
  cursor: pointer;
  padding: 0.5rem;
  color: var(--gx-text);
}

.gx-nav-toggle svg {
  width: 24px;
  height: 24px;
}

/* =============================================================================
   4. BUTTONS
   ============================================================================= */

.gx-btn {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.7rem 1.4rem;
  border-radius: 6px;
  font-size: 0.875rem;
  font-weight: 600;
  font-family: var(--gx-font-sans);
  border: none;
  cursor: pointer;
  transition: all var(--gx-transition);
}

.gx-btn-primary {
  background: var(--gx-accent);
  color: var(--gx-bg);
}

.gx-btn-primary:hover {
  background: var(--gx-accent-hover);
  color: var(--gx-bg);
}

.gx-btn-secondary {
  background: transparent;
  color: var(--gx-text);
  border: 1px solid var(--gx-border);
}

.gx-btn-secondary:hover {
  border-color: var(--gx-accent);
  color: var(--gx-accent);
}

.gx-btn-sm {
  padding: 0.55rem 0.875rem;
  font-size: 0.8rem;
}

.gx-btn svg {
  width: 16px;
  height: 16px;
}

/* =============================================================================
   5. LAYOUT & SECTIONS
   ============================================================================= */

.gx-section {
  max-width: var(--gx-max-width);
  margin: 0 auto;
  padding: 5rem 2rem;
}

.gx-section-header {
  text-align: center;
  margin-bottom: 3.5rem;
}

.gx-section-header h2 {
  font-size: 1.75rem;
  font-weight: 700;
  letter-spacing: -0.025em;
  margin-bottom: 0.75rem;
  color: var(--gx-text-bright);
}

.gx-section-header p {
  color: var(--gx-text-muted);
  font-size: 1.05rem;
}

.gx-divider {
  max-width: var(--gx-max-width);
  margin: 0 auto;
  padding: 0 2rem;
}

.gx-divider hr {
  border: none;
  border-top: 1px solid var(--gx-border);
}

/* =============================================================================
   6. HERO
   ============================================================================= */

.gx-hero {
  padding: 6rem 2rem 5rem;
  text-align: center;
  max-width: var(--gx-max-width);
  margin: 0 auto;
}

.gx-hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.375rem 1rem;
  border: 1px solid var(--gx-border);
  color: var(--gx-text-muted);
  border-radius: var(--gx-radius-pill);
  font-size: 0.8125rem;
  font-weight: 500;
  margin-bottom: 2rem;
  letter-spacing: 0.01em;
}

.gx-hero-badge svg {
  width: 14px;
  height: 14px;
  color: var(--gx-accent);
}

.gx-hero h1 {
  font-size: clamp(2.5rem, 5vw, 3.75rem);
  font-weight: 800;
  line-height: 1.1;
  letter-spacing: -0.035em;
  margin-bottom: 1.5rem;
  max-width: 780px;
  margin-left: auto;
  margin-right: auto;
  color: var(--gx-text-bright);
}

.gx-hero h1 .gx-accent {
  color: var(--gx-accent);
}

.gx-hero > p {
  font-size: 1.15rem;
  color: var(--gx-text-muted);
  max-width: 600px;
  margin: 0 auto 2.5rem;
  line-height: 1.75;
}

.gx-hero-actions {
  display: flex;
  gap: 1rem;
  justify-content: center;
  flex-wrap: wrap;
}

/* =============================================================================
   7. FEATURE BANNER
   ============================================================================= */

.gx-features-banner {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1px;
  max-width: var(--gx-max-width);
  margin: 0 auto;
  padding: 0 2rem;
  background: var(--gx-border);
  border-radius: var(--gx-radius-lg);
  overflow: hidden;
}

.gx-feature-item {
  display: flex;
  align-items: flex-start;
  gap: 1rem;
  padding: 2rem;
  background: var(--gx-bg-alt);
}

.gx-feature-icon {
  flex-shrink: 0;
  width: 36px;
  height: 36px;
  border-radius: var(--gx-radius);
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--gx-accent-dim);
  color: var(--gx-accent);
}

.gx-feature-icon svg {
  width: 18px;
  height: 18px;
}

.gx-feature-item h3 {
  font-size: 0.9rem;
  font-weight: 600;
  margin-bottom: 0.25rem;
  color: var(--gx-text-bright);
  letter-spacing: -0.01em;
}

.gx-feature-item p {
  font-size: 0.85rem;
  color: var(--gx-text-muted);
  line-height: 1.55;
}

/* =============================================================================
   8. PANELS & ALERTS
   ============================================================================= */

.gx-panel {
  background: var(--gx-bg-alt);
  border: 1px solid var(--gx-border);
  border-radius: var(--gx-radius-lg);
  padding: 1.5rem;
}

.gx-panel-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 1rem;
  padding-bottom: 0.75rem;
  border-bottom: 1px solid var(--gx-border);
}

.gx-panel-header h3 {
  font-size: 0.95rem;
  font-weight: 600;
  color: var(--gx-text-bright);
}

.gx-alert {
  padding: 0.875rem 1rem;
  border-radius: var(--gx-radius);
  font-size: 0.85rem;
  line-height: 1.6;
  display: flex;
  align-items: flex-start;
  gap: 0.75rem;
}

.gx-alert svg {
  width: 18px;
  height: 18px;
  flex-shrink: 0;
  margin-top: 0.1rem;
}

.gx-alert-info {
  background: var(--gx-accent-dim);
  color: var(--gx-accent);
  border: 1px solid rgba(20, 184, 166, 0.2);
}

.gx-alert-warning {
  background: rgba(245, 158, 11, 0.1);
  color: var(--gx-warning);
  border: 1px solid rgba(245, 158, 11, 0.2);
}

.gx-alert-error {
  background: rgba(239, 68, 68, 0.1);
  color: var(--gx-error);
  border: 1px solid rgba(239, 68, 68, 0.2);
}

/* =============================================================================
   9. FORM CONTROLS
   ============================================================================= */

.gx-input,
.gx-select,
.gx-textarea {
  width: 100%;
  padding: 0.625rem 0.875rem;
  background: var(--gx-bg);
  border: 1px solid var(--gx-border);
  border-radius: 6px;
  color: var(--gx-text);
  font-family: var(--gx-font-sans);
  font-size: 0.875rem;
  transition: border-color var(--gx-transition);
}

.gx-input:focus,
.gx-select:focus,
.gx-textarea:focus {
  outline: none;
  border-color: var(--gx-accent);
}

.gx-input::placeholder,
.gx-textarea::placeholder {
  color: var(--gx-text-muted);
}

.gx-select {
  appearance: none;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' viewBox='0 0 24 24' fill='none' stroke='%2394A3B8' stroke-width='2' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpath d='m6 9 6 6 6-6'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right 0.75rem center;
  padding-right: 2.5rem;
}

.gx-textarea {
  resize: vertical;
  min-height: 100px;
}

.gx-label {
  display: block;
  font-size: 0.8125rem;
  font-weight: 500;
  color: var(--gx-text-bright);
  margin-bottom: 0.375rem;
}

.gx-input-group {
  margin-bottom: 1rem;
}

/* =============================================================================
   10. THEME TOGGLE
   ============================================================================= */

.gx-theme-toggle {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  background: none;
  border: 1px solid var(--gx-border);
  border-radius: var(--gx-radius-pill);
  padding: 0.25rem;
  cursor: pointer;
  color: var(--gx-text-muted);
  transition: border-color var(--gx-transition);
}

.gx-theme-toggle:hover {
  border-color: var(--gx-accent);
}

.gx-theme-toggle-option {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 28px;
  height: 28px;
  border-radius: 50%;
  border: none;
  background: none;
  color: var(--gx-text-muted);
  cursor: pointer;
  transition: all var(--gx-transition);
}

.gx-theme-toggle-option svg {
  width: 14px;
  height: 14px;
}

.gx-theme-toggle-option.active {
  background: var(--gx-accent);
  color: var(--gx-bg);
}

/* =============================================================================
   11. FOOTER
   ============================================================================= */

.gx-footer {
  margin-top: auto;
  border-top: 1px solid var(--gx-border);
  padding: 2rem;
  font-size: 0.8rem;
  color: var(--gx-text-muted);
}

.gx-footer-inner {
  max-width: var(--gx-max-width);
  margin: 0 auto;
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.gx-footer-links {
  display: flex;
  gap: 1.5rem;
  list-style: none;
}

.gx-footer-links a {
  color: var(--gx-text-muted);
  font-size: 0.8rem;
}

.gx-footer-links a:hover {
  color: var(--gx-accent);
}

/* =============================================================================
   12. UTILITIES
   ============================================================================= */

.gx-text-muted    { color: var(--gx-text-muted); }
.gx-text-bright   { color: var(--gx-text-bright); }
.gx-text-accent   { color: var(--gx-accent); }
.gx-text-center   { text-align: center; }
.gx-text-mono     { font-family: var(--gx-font-mono); }
.gx-text-sm       { font-size: 0.85rem; }
.gx-text-xs       { font-size: 0.75rem; }

.gx-flex           { display: flex; }
.gx-flex-col       { flex-direction: column; }
.gx-items-center   { align-items: center; }
.gx-justify-between { justify-content: space-between; }
.gx-gap-1         { gap: var(--gx-space-1); }
.gx-gap-2         { gap: var(--gx-space-2); }
.gx-gap-4         { gap: var(--gx-space-4); }
.gx-gap-6         { gap: var(--gx-space-6); }
.gx-gap-8         { gap: var(--gx-space-8); }

.gx-mt-4  { margin-top: var(--gx-space-4); }
.gx-mt-6  { margin-top: var(--gx-space-6); }
.gx-mt-8  { margin-top: var(--gx-space-8); }
.gx-mb-4  { margin-bottom: var(--gx-space-4); }
.gx-mb-6  { margin-bottom: var(--gx-space-6); }
.gx-mb-8  { margin-bottom: var(--gx-space-8); }

.gx-mx-auto { margin-left: auto; margin-right: auto; }
.gx-w-full  { width: 100%; }
.gx-flex-1  { flex: 1; }

/* =============================================================================
   13. ANIMATIONS
   ============================================================================= */

@keyframes gx-fadeIn {
  from { opacity: 0; }
  to { opacity: 1; }
}

.gx-animate-in {
  animation: gx-fadeIn 0.4s ease forwards;
  opacity: 0;
}

/* =============================================================================
   14. SMOOTH THEME TRANSITIONS
   ============================================================================= */

body {
  transition: background-color 0.3s ease, color 0.3s ease;
}

.gx-nav,
.gx-panel,
.gx-footer,
.gx-feature-item,
.gx-alert,
.gx-input,
.gx-select,
.gx-textarea {
  transition: background-color 0.3s ease, border-color 0.3s ease, color 0.3s ease;
}

/* =============================================================================
   15. RESPONSIVE
   ============================================================================= */

@media (max-width: 768px) {
  .gx-nav-links {
    display: none;
    position: absolute;
    top: var(--gx-nav-height);
    left: 0;
    right: 0;
    background: var(--gx-bg-alt);
    border-bottom: 1px solid var(--gx-border);
    flex-direction: column;
    padding: 1rem 2rem;
    gap: 0.75rem;
  }

  .gx-nav-links.open {
    display: flex;
  }

  .gx-nav-toggle {
    display: block;
  }

  .gx-hero {
    padding: 4rem 1.5rem 3rem;
  }

  .gx-section {
    padding: 3rem 1.5rem;
  }

  .gx-features-banner {
    grid-template-columns: 1fr;
    padding: 0 1.5rem;
  }

  .gx-footer-inner {
    flex-direction: column;
    gap: 1rem;
  }

  .gx-hero-actions {
    flex-direction: column;
    align-items: center;
  }
}